Reclamation Area Research Articles

Investigating Surface Deformation and Its Intrinsic Mechanism in Shenzhen, China Using Sentinel‐1A SAR Imagery

AbstractTo avoid disasters caused by surface deformation in urban areas, monitoring and analyzing the mechanism of surface deformation in urban areas on a large scale and in long‐term series is mandatory. Based on PS‐InSAR technology and using 157 Sentinel‐1A images, the surface deformation in Shenzhen was monitored from 2015 to 2022, and the obtained deformation rate ranged from −22.8 to +23.2 mm/year. In this paper, analysis is presented by integrating urbanization, climate, and geology data from Shenzhen. The analysis indicates that surface deformation caused by natural factors is typically observed in regions with unique geological characteristics, such as seasonal deformation in sedimentary areas and uplift along reverse fault zones. Human factors chiefly cause subsidence, and the areas with greater subsidence are generally urbanized areas (∼10 mm/year), industrial areas (∼20 mm/year), and reclamation areas (∼15 mm/year). The deformation of the reservoir dam is subject to multiple factors. The differential subsidence of 2–8 mm/year at both ends is due to the engineering geological conditions. In comparison, the weak rotation with a linear velocity of 18 mm/year is due to hydrostatic pressure and its structural characteristics. The research results of this paper systematically explore the phenomena and the intrinsic mechanism of surface deformation in Shenzhen, providing a safety basis for urban development and emergency disaster prevention in Shenzhen.

DeapSea: Workflow-Supported Serious Game Design for Stroke Rehabilitation

The design and development of a serious game are complex due to different and often numerous stakeholders involved. Different guidelines for general best practices exist, but those are not specific and often do not include therapists or patients as essential stakeholders especially in the context of individualisation of a serious games. Although there are a lot of serious games in the area of (stroke) rehabilitation, design guidelines and indications of what is important are quite scarce. Identifying individualisation possibilities to adapt a serious game to the specific needs of patients was identified to support and improve the design and outcome of serious game development. A literature research and the analysis of previously designed serious games created the foundation for this research. The identified configuration possibilities, additional requirements, and the developed workflow were then evaluated with the gathered insights of therapists trough an online survey. 20 generic configuration possibilities for therapists, as well as seven requirements, were identified and are presented, which can be used when designing a serious game in the context of stroke. In addition a workflow, called “DeapSea” is proposed for supporting the design as well. These results should be used as an addition to already established design recommendations to deliver an adaptable and flexible serious game in the area of stroke—helping to fulfill individual patient needs from the point of therapists and other involved medical stakeholders within the rehabilitation process.

A novel index combining temperature and vegetation conditions for monitoring surface mining disturbance using Landsat time series

The exploitation and utilization of mineral resources have significantly contributed to economic and social development; however, the procession has also negatively impacted the ecological environment. Thus, it is necessary to effectively monitor coalfields, an important basis for reasonable development and utilization of coalfields and following ecological reclamation. Based on MODIS Global Damage Index, We couple the Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI), and proposal the Mine Landscape Damage Index (MLDI) and Mine Landscape Reclamation Index (MLRI) to supervise the disturbed vegetation of mines. Huolinhe coalfield, one of the largest mines in China, is monitored in this research. 3675 Landsat imageries from 1990 to 2020 are analyzed using the LandTrendr algorithm with MLDI and MLRI time series data on Google Earth Engine. The results demonstrate that this method could distinguish the region and disturbing process of damage and reclamation due to its effectiveness proved by visual interpretation of high-resolution imageries and verification of field investigation. The total detected area of vegetation damage was 16505.10 ha, and the vegetation damage in the mining was active from 2006 to 2011, with average annual damage of more than 1000 ha. The total area of vegetation restoration in the mine is 8640.81 ha, accounting for 52.35% of the vegetation damage. Vegetation restoration has increased gradually since 2010. In the past three years, vegetation restoration accounted for 47.61% of the total reclamation area. A novel index for monitoring the effects of surface damage in multi-open-pit mining areas is provided to us, and the detection is reliable. It can give the government an effective practical data reference in the sustainable development of utilization management and ecological reclamation in coalfield.

567 Outcomes of an Education Program on the Rehabilitation of Face and Neck Burns

Abstract Introduction Face and neck burns bring unique complications and often require specific training and experience for the burn physical rehabilitation professional. The COVID-19 Pandemic created a need for virtual learning during a time when in-person learning was not possible. While this format can meet some needs, it does not allow for practice and interaction with instructors. There are limited education and training opportunities for burn therapists which include such extensive practical opportunities. This unique didactic training program provided mentorship and tangible skills of a complex and specialized area of burn rehabilitation. Methods • Learning Objectives were determined using the Burn Therapist Competency Tool-Version 2 • Developed curriculum for each facial/neck regions as well as various scar management techniques throughout the continuum of care • Individual modules were developed by Occupational Therapists, Physical Therapist and Speech and Language Pathologist with experience in the field • The in-person course consisted of 4 hours of lecture and 8 hours of hands-on splinting and scar management training • Instructors provided interactive and collaborative feedback for every participant Pre & Post testing completed to assess learning • Feedback from participants was assessed for quality improvement • Follow up questionnaire was provided to assess implementation into clinical practice and self-perceived level of experience related to rehabilitation of face/neck burns Results 24 Occupational, Physical and Speech Therapists participated in the 2-day course. Results of the post-test indicate increased knowledge pertaining to the learning objectives. 21 participants remained for the second day of the hands-on splinting and scar management portions and demonstrated learned knowledge of these intervention techniques. Post-course assessments attest to increased comfort with new skills. Participant follow up gaged overall effectiveness of clinical practice improvements. Conclusions Participant feedback provided valuable insight into the ongoing need for training and mentoring of burn therapists. This is vital in developing additional training resources, including step-by-step explanation and video content for repetition and learning. Ultimately, implementation of these new skills into each participant’s clinical practice was the desired outcome of this course. Applicability of Research to Practice This project highlighted the gap in knowledge for burn therapists when it came to face and neck burns.

A New Technique for Impervious Surface Mapping and Its Spatio-Temporal Changes from Landsat and Sentinel-2 Images

Accurately mapping and monitoring the urban impervious surface area (ISA) is crucial for understanding the impact of urbanization on heat islands and sustainable development. However, less is known about ISA spectra heterogeneity and their similarity to bare land, wetland, and high-rise-building shadows. This study proposes a feature-based approach using decision tree classification (FDTC) to map ISAs and their spatio-temporal changes in a coastal city in southeast China using Landsat 5 TM, Landsat 8 OLI/TIRS, and Sentinel-2 images from 2009 to 2021. Atmospheric correction using simplified dark object subtraction (DOS) was applied to Landsat imagery, which enabled faster computation. FDTC’s performance was evaluated with three sensors with different spectral and spatial resolutions, with parameter thresholds held constant across remote-sensing images. FDTC produces a high average overall accuracy (OA) of 94.53%, a kappa coefficient (KC) of 0.855, and a map-level image classification efficacy (MICE) of 0.851 for ISA mapping over the studied period. In comparison with other indices such as BCI (biophysical composition index), PISI (automated built-up extraction index), and ABEI (perpendicular impervious surface index), the FDTC demonstrated higher accuracy and separability for extracting ISA and bare land as well as wetland and high-rise buildings. The results of FDTC were also consistent with those of two open-source ISA products and other remote sensing indices. The study found that the ISA in Xiamen City increased from 16.33% to 26.17% over the past 13 years due to vegetation occupation, encroachment onto bare land, and reclamation of coastal areas. While the expansion significantly reduced urban vegetation in rapidly urbanizing areas of Xiamen, ambitious park greening programs and massive redevelopment of urban villages resulted in a modest but continuous increase in urban green space.

Why and how to publish aphasia-friendly research summaries

BackgroundA common complaint of people with aphasia and their families is their inability to find information about current aphasia treatment research (Hinckley, Boyle, Lombard & Bartels-Tobin, 2014; Hinckley & El-Khouri, 2021). Plain language summaries, video summaries, and graphical summaries are three ways to disseminate research results that are more accessible to a broader audience. The purpose of this tutorial is to discuss the motivations for disseminating research in understandable ways, and to provide information and resources on how aphasia-friendly dissemination can be done. MethodWe report an overview of evidence on the importance of and characteristics of dissemination. Next, we provide specific characteristics and resources for producing plain language summaries, video summaries, and graphical abstracts. Finally, we conducted a systematic search for journals in the area of stroke rehabilitation after consultation with a research librarian. The publication webpages of each journal were inspected to gather information about whether and how the journal published plain language summaries, video summaries, or graphical abstracts. Editors were contacted as needed to complete the information. Sixty journals in stroke rehabilitation were identified, and a total of 43 journals (71%) publish video abstracts, graphical summaries, and/or plain language summaries either independently or through third-party platforms. ConclusionsThe findings are discussed in the context of the importance of making research consumer-friendly. We offer specific recommendations for aphasia researchers, and future directions for publishing research in ways that will have an impact on the broader public are suggested.

Research hotspots and frontiers of post-stroke aphasia rehabilitation: a bibliometric study and visualization analysis.

Aphasia is a common complication of stroke and is associated with high morbidity and mortality rates. Rehabilitation plays a crucial role in the comprehensive management of post-stroke aphasia and its consequences. However, bibliometric analysis in the field of post-stroke aphasia rehabilitation is still lacking. This study aimed to comprehensively identify assistance networks, analyze research trends, focus on hot and cutting-edge health topics related to post-stroke aphasia rehabilitation, and inform future research guidelines. The Web of Science Core Collection (WoSCC) electronic database was searched from inception to January 4, 2023 to identify studies related to post-stroke aphasia rehabilitation. Bibliometric analysis and visualization of country, institution, journal, author, reference, and keywords were performed using CiteSpace and VOSviewer software. A total of 2,325 papers were included in the analysis, with a progressive increase in the number of articles published each year. The USA was the country with the most publications (809 articles), and the University of Queensland was the institution with the most publications (137 articles). The subject area of post-stroke aphasia rehabilitation is dominated by clinical neurology (882 articles). Aphasiology was the journal with the most publications (254 articles) and the most cited journal (6,893 citations). Worrall L was the most prolific author (51 publications), and Frideriksson J was the most cited author (804 citations). By using bibliometrics, we provided a comprehensive review of studies related to post-stroke aphasia rehabilitation. Future research hotspots on topics related to post-stroke aphasia rehabilitation will mainly focus on the plasticity mechanisms of neurolinguistics networks, language function assessment, language rehabilitation modalities, and patients' rehabilitation needs and participation experiences in post-stroke aphasia. This paper provides systematic information that is worth exploring in the future.

KESESUAIAN LAHAN UNTUK TANAMAN REKLAMASI DI LAHAN PASCATAMBANG BATUBARA

This study aims to analyze land suitability in reclamation and revegetation sites for sengon, trembesi, mahogany and acacia plants. Research was conducted in November 2022 at PT Adaro Indonesia Site Tanjung, South Kalimantan Province. Data collection was in the form of analysis of soil quality in the reclamation areas of Wara 1, Wara 2, Wara 3 and Wara 4 and data on land characteristics as a condition for growing sengon, acacia, trembesi and mahogany plants, then a matching method was carried out to obtain land suitability for these plant types. The results showed that the actual land suitability for sengon plants in the entire study area was incompatible with the inhibiting factors for nutrient retention and quite compatible with the inhibiting factors for water availability (S3nr.S2wa) and the potential land suitability was S2nr. Land suitability for acacia plants in all study areas found land that was not suitable for nutrient retention inhibiting factors (S3nr) and potential land suitability was S2nr. Land suitability for trembesi plants in Wara 1 and Wara 2 obtained land yields that were not in accordance with the nutrient retention inhibiting factor (S3nr) and S2nr potential land suitability, while in the Wara 3 and Wara 4 areas suitable land yields were obtained without any limiting factors. Land suitability for mahogany plants in all study areas found land that was not suitable for the limiting factor of nutrient retention and quite suitable for the limiting factor for water availability (S3nr.S2wa).

Land Subsidence in the Singapore Coastal Area with Long Time Series of TerraSAR-X SAR Data

Global sea level rise is a major environmental concern for many countries and cities, particularly for low-lying coastal areas where urban development is threatened by the combined effects of sea level rise and land subsidence. This study employed an improved two-layer network Persistent Scatterers Interferometric Synthetic Aperture Radar (PS-InSAR) technology to obtain high-precision land subsidence in Singapore from 2015 to 2019. Landsat images from 1973 to 2020 were also utilized to extract changes in Singapore’s coastline. Geological, topographical, and global sea level rise data were integrated to investigate the causes and impacts of land subsidence in Singapore. The results indicate that the areas with severe subsidence coincide with land reclamation areas, where subsidence is mainly due to soil consolidation. Based on WorldDEM, land subsidence, and sea level rise data, the maximum inundation depth in Singapore by 2050 is estimated to be 1.24 m, with the Marina Bay area in Singapore’s central business district being the most vulnerable to sea level rise. This study provides data support and a scientific basis for understanding the impact of land subsidence on Singapore’s coastal areas under the influence of multiple factors using advanced InSAR technology.

DISTRIBUTION OF BOTTOM SEDIMENT BEFORE AND AFTER RECLAMATION AT CENTER POINT OF INDONESIA (CPI) MAKASSAR CITY

Characteristics and distribution of bottom sediment is one of the important parameters in determining the management plan and land use in coastal areas. The purpose of this study was to determine the condition of the distribution of bottom sediments and to compare the changes that occurred in the distribution of bottom sediment before and after the reclamation of the Center Point of Indonesia (CPI) in Makassar City. Sediment sampling was carried out using a grab sampler at four stations, namely stastions on the island adjacent to the reclamation area and two other stations in the water around the reclamation area. The results showed that the bottom sediment in the waters around the reclamation area consisted of coarse sand and medium sand with an organic matter content of 14.92% in the sediment. On the islands adjacent to the reclamation area, the bottom sediments are move varied, consisting of coarse sand, medium sand and fine sand with lower organic matter content of 4.92% to 5.38%.

A Comparative Study of Rehabilitation Information Systems in 8 Countries: A Literature Review

Objectives: This study aims to comparatively review the rehabilitation information systems in 8 countries: Canada, the United States, the United Kingdom, Sweden, Australia, Malaysia, Russia, and Iran. Methods: A comprehensive review of published studies without a time limit was explored by searching the keywords, titles, and abstracts. Studies were obtained from the Web of Science, Scopus, PubMed, and Embase databases on May 2, 2021. We also did a Google search engine to explore rehabilitation information system websites in each country. The inclusion criteria included all English and Persian articles in the field of rehabilitation information registration systems or minimum data sets and the availability of complete text of the articles. A total of 13151 related studies were extracted and finally 25 main articles and 6 websites were selected. A similar standard checklist was used to extract and compare the findings. The data items in this checklist included reference, country, registry name, established year, founder, scope, standard classification systems (coding system), data elements, and subcategories of data elements of the registry. Results: The literature review revealed that the United States has international rehabilitation outcomes in three areas of inpatient, outpatient, and pediatric rehabilitation that collect data from around the world. Australia has a national clinical registry for outpatient and inpatient rehabilitation outcomes for adults and children. Canada, with its national rehabilitation reporting system, gathers only adult inpatient rehabilitation information. In sweden, the Swedish Rehabilitation Medical Register includes rehabilitation activities in both inpatient and outpatient care. Rehabilitation in Malaysia with no data sharing and integration is still in its infancy. The rehabilitation information system in the UK only includes specialized rehabilitation services. In Iran, the Welfare Organization registers and collects (inpatient, outpatient, and home care) rehabilitation and financial data of the disabled with the “payment” system. In Russia, only some studies have proposed the launch of a rehabilitation information system. Discussion: The results of this literature review demonstrate that the most comprehensive rehabilitation information systems first belonged to the United States, and then to Australia, Canada, Sweden, the United Kingdom, and Iran in descending order. Meanwhile, a rehabilitation information system is being developed in Malaysia. However, Russia has not yet developed a comprehensive rehabilitation information system.

Dynamics of Herbivorous Fish and Its Role in Controlling Algal Coverage in Coral Reef Restoration Area Affected by the Bleaching Phenomenon in 2016

Coral reefs in the waters of Liukangloe Island were reported to have experienced a bleaching phenomenon in May 2016 and rehabilitation efforts were carried out in 2019. This study aimed to analyze the structure of the herbivorous fish community and its role in controlling algal cover in the rehabilitation area. Observations of herbivorous fish were carried out using visual census techniques on an area of ​​4m2 and observation of algae in 0.5x0.5 m2 transects on several coral attachment media from dead coral substrates. The results showed that the proportion of herbivorous fish species in the transplant area ranged from 15.81-58.67% and the proportion of individuals ranged from 12.51-34.62%. The dynamics of the number of species and abundance of herbivorous reef fish did not show significant differences between substrates and had the same dynamic pattern in all substrates uses but varied temporally according to the time of observation. The exception is the rubble area which continues to increase until the end of the observation. A high number of herbivorous fish species richness was observed in the branching and natural coral substrates and low in the rubble substrate. The abundance of herbivorous reef fish showed a significant and negative relationship to algal cover and confirmed that the presence of herbivorous reef fish could control or reduce the value of algal cover.

Skills necessary to conduct a competent conversation with the ward in social rehabilitation work

The article presents an analysis of decision-making issues regarding the selection of appropriate skills during an interview. An important issue in the area of justice and social rehabilitation is the skilful conversation. It is necessary to train the personnel in such a way as to obtain precise and complete information through all elements of the social rehabilitation system. By improving conversation techniques, the functioning of the entire social rehabilitation system will be improved, because it largely consists in collecting and providing information in a direct way.Innovative methods of conducting interviews should be implemented in social rehabilitation, should be based on empirical evidence, and the information contained in them should be presented in a practical way.

Assessment of Carbon Storage Capacity of Stands in Abandoned Coal Mine Forest Rehabilitation Areas over time for its Development of Management Strategy

Assessment of Carbon Storage Capacity of Stands in Abandoned Coal Mine Forest Rehabilitation Areas over time for its Development of Management Strategy

THE CONCEPTUAL AND TERMINOLOGICAL APPARATUS IN THE FIELD OF REHABILITATION

The article shows the conceptual and terminological apparatus of the rehabilitation area (physical therapy, ergotherapy, speech and language therapy, physical therapist, ergotherapist) by analyzing the legislative framework and scientific sources. This analysis showed the multidirectionality of the directions of rehabilitation. Different specialists do separate rehabilitation tasks for physical therapy and separately for occupational therapy. This approach contributes to a high-quality rehabilitation process for patients (recovery from injuries – it is doing physical therapists, or acute diseases – stroke – it is doing occupational therapists).The terminological aspects in the rehabilitation area at different educational levels are formulated: physical therapy, ergotherapy, training of physical therapists, occupational therapists at the bachelor’s level, training of physical therapists, occupational therapists at the master’s level.In the structure of the training of rehabilitation specialists, the directions of rehabilitation are highlighted (227.1Physical therapy; 227.2 Ergotherapy; 227.3 Speech and language therapy), which allows universities to focus and specify the training of these specialists at the bachelor’s and master’s levels. Namely, the focus is on professional competencies for occupational therapists and physical therapists. And also, in accordance with the legislative framework, directs the professional direction of the work of physical therapists, occupational therapists and future – speech and language therapists.
 Keywords: physical therapy, ergotherapy, speech and language therapy, physical therapists, ergotherapists, bachelor`s level, master`s level, rehabilitation process.

Dynamic influence of land reclamation on the nitrate contamination and saltwater redistribution

Previous research concerning the effect of land reclamation on seawater intrusion mostly focused on the modification of the saltwater wedge and the dynamics of freshwater-saltwater interface after land reclamation, utilizing both analytical and numerical models. So far, the impact of land reclamation on the recharging and accumulation of land-based pollutants such as nitrate has been disregarded. In this work, we are the first to examine the impact of land reclamation on the discharge of nitrate together with the movement of saltwater. The influence of reclamation area and filled soil permeability on nitrate pollution and saltwater redistribution is revealed using a series of field-scale simulations based on numerical models including density flow combined with reactive transport. It was discovered that land reclamation might, on the one hand, result in a substantial redistribution based on the initial saltwater-freshwater interface and, on the other hand, significantly modify the nitrate discharge. This in total would drastically alter the distribution of nitrate in the subsurface. The reclamation area and the permeability of the reclamation material are the two elements that determine the amount of variance. For the cases with hydraulic conductivities increasing from 5 to 50 m/d, the salt mass reduction rate showed a trend of first increased (84.78 %–95.58 %) and then slowly decreased (95.58 %–74.01 %). Meanwhile, the nitrate reduction rate decreased from 80.08 % to 12.93 %, when hydraulic conductivities increased from 5 to 50 m/d. It was also found that coastal nitrate accumulation was always intensified with the enlargement of the reclamation area. Finally, we are able to assist engineers in optimizing their land reclamation strategies by taking into account both the degree of saltwater intrusion and nitrate enrichment.

Spatiotemporal Evolution and Risk Analysis of Land Use in the Coastal Zone of the Yangtze River Delta Region of China

The extensive accumulation of big data, along with the development of a high-performance platform, bridge the gap between the previous inability to provide long-term time series and broad-scale coastal zone monitoring and risk warnings with remote sensing techniques. Based on 20 years of Landsat images from the Google Earth Engine platform, the time series land cover in the coastal zone of the Yangtze River Delta in China was classified. Then, a spatiotemporal clustering method based on grid segmentation was proposed to analyze the spatiotemporal evolution details of artificial surface expansion and the risks of cropland loss and ecological degradation caused by this. The results showed that significant changes have taken place in the quantitative structure and spatial morphology of coastal land use in the past 20 years. The artificial surface maintained a growth trend, increasing by 229%, while cropland decreased by 19%. Natural land showed a fluctuation pattern of “up→down→up”. The spatiotemporal details of land use obtained through 1km grid segmentation and clustering analysis were more significant. The artificial surface mainly underwent a progressive spatial expansion along the central urban area and important transportation axes (types III and IV), with the most dramatic changes occurring from 2010 to 2013. Type III cropland loss was the most significant, falling from 75.02% in 2000 to 38.23% in 2020. At the same time, the change in type III water body corresponds to the newly increased area of reclamation, which has decreased by 17% in the past 20 years, indicating that the degradation of coastal natural wetlands was significant. This paper provided a comprehensive diagnosis of coastal land use change, which could help policy makers and implementers to propose more targeted and differentiated coastal development and protection policies.

Multispectral Remote Sensing Monitoring of Soil Particle-Size Distribution in Arid and Semi-Arid Mining Areas in the Middle and Upper Reaches of the Yellow River Basin: A Case Study of Wuhai City, Inner Mongolia Autonomous Region

Particle size distribution is an important characteristic of reclaimed soil in arid and semi-arid mining areas in western China, which is important in the ecological environment protection and control of the Yellow River Basin. Large-scale coal resource mining disturbances have caused serious damage to the fragile ecological environment. The timely and accurate dynamic monitoring of mining area topsoil information has practical significance for ecological restoration and management evaluation. Investigating Wuhai City in the Inner Mongolia Autonomous Region of China, this study uses Landsat8 OLI multispectral images and measured soil sample particle size data to analyze soil spectral characteristics and establish a particle size content prediction model to retrieve the particle size distribution in the study area. The experimental results and analysis demonstrate that: (1) the 6SV (Second Simulation of the Satellite Signal in the Solar Spectrum Vector version) atmospheric correction model is more accurate than the FLAASH (Fast Line-of-sight Atmospheric Analysis of Hypercubes) model in arid and semi-arid areas with undulating terrain; (2) 0–40 cm is the optimum soil thickness for modeling and predicting particle size content in this study; and (3) the multi-band prediction model is more precise than the single-band prediction model. The multi-band model’s sequence of advantages and disadvantages is SVM (Support Vector Machine) > MLR (Multiple Linear Regression) > PLSR (Partial Least Squares Regression). Among them, the 6SV-SVM model has the highest precision, and the prediction precision R2 of the 3 particle sizes’ contents is above 0.95, which can effectively predict the soil particle-size distribution and provide effective data to support topsoil quality change monitoring in the mine land reclamation area.

Laboratory simulation of the swampy forest system for the passive treatment of acid mine drainage in coal mine reclamation areas

Coal mining that applies the open pit method has the potential to generate acid mine drainage. Acid mine drainage (AMD) treatments must include processes to mitigate significant challenges; these treatments include active treatment with high costs and process uncertainty and passive treatment with its limitations. The new concept of the swampy forest system involves the development of passive treatment for AMD, which lowers costs, increases capacity, and provides a natural process to mitigate the AMD that has been generated. A laboratory simulation experiment was carried out to obtain the basic data required for the swampy forest system treatment. The basic reference data determined in this study, including the total volume of water, the water debt flows into the swampy forest scale laboratory system and the retention time, were obtained to bring the parameter values that failed to meet the quality standards into compliance, according to the applicable regulations. The AMD swampy forest treatment design in the pilot project at the treatment field can apply a scaled-up version of the basic data from the simulation laboratory experiment results.

Erosion Rate in Post-Coal Mining Reclamation Area in Kutai Kartanegara District, Indonesia

Erosion is the transport of parts of the soil from one place to another by natural agent, namely water, and wind. Mining in Indonesia generally uses open-pit mining methods. Generally, open pit mining has a very high erosion rate due to damage to soil aggregation and high interaction with rainwater. This study aims to determine the erosion rate and hazard class in the post-coal mining reclamation area. The research location was in the Jembayan Muarabara Group, Kutai Kartanegara Regency, East Kalimantan Province, from February 2021 to May 2021. The erosion rate measurement in this study used the stick method by measuring the erosion rate based on the change in soil surface loss in centimetres (cm) units. Erosion rate data collection is carried out periodically every month. The results showed that the highest erosion was in the Disposal area, namely 558.55 - 1341.94 tons/ha/year, including class V (very high), in the Stock Soil area with an erosion rate of 471.79 - 693.51 tons/ha/year including class IV (high) to class V (very high) and the lowest erosion rate in the reclamation area in 2019, namely 189.51 - 673.88 tons/ha/year including class IV (high) to class V (very high). Factors that affect the magnitude of the erosion rate are land cover vegetation, soil slope, and the soil's physical properties.